/*
 * Tencent is pleased to support the open source community by making Angel available.
 *
 * Copyright (C) 2017 THL A29 Limited, a Tencent company. All rights reserved.
 *
 * Licensed under the BSD 3-Clause License (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 *
 * https://opensource.org/licenses/BSD-3-Clause
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License
 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 *
 */

package com.tencent.angel.ml.optimizer.sgd;

import com.tencent.angel.ml.math.TAbstractVector;
import com.tencent.angel.ml.math.vector.TDoubleVector;

public interface Loss {

  double loss(double pre, double y);

  double grad(double pre, double y);

  double predict(TDoubleVector w, TAbstractVector x);

  boolean isL2Reg();

  boolean isL1Reg();

  double getRegParam();

  double getReg(TDoubleVector w);

}
